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CVE-2021-20286: redhat enterprise_linux Reachable Assertion

CVSS: 4.0v2.0MediumModified
AliasesSUSE-SU-2021:2274-1UBUNTU-CVE-2021-20286DEBIAN-CVE-2021-20286
Published 15-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-20286 is a medium (CVSS 4.0) Reachable Assertion vulnerability in redhat enterprise_linux. EPSS estimates a 1.14% chance of exploitation in the next 30 days, higher than 66% of scored vulnerabilities.

Overall risk
16/100
0100
Low · default modelHow is this calculated?
CVSS score
4.0/10
010
Medium · v2.0 (NVD)
EPSS score
1.14%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to denial of service.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.14%

Chance of exploitation in the next 30 days

Percentile

66%

Versus all other CVEs

30-day change

0.00 pp

From 1.14% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse3 products
  • containerized-data-importer&distro=SUSE Linux Enterprise Module for Containers 15 SP2< 1.30.0-5.3.2
  • kubevirt&distro=SUSE Linux Enterprise Module for Containers 15 SP2< 0.40.0-5.11.2
  • kubevirt&distro=SUSE Linux Enterprise Module for Containers 15 SP3< 0.40.0-5.11.2
Opensuse2 products
  • kubevirt&distro=openSUSE Leap 15.3< 0.40.0-5.11.2
  • libnbd&distro=openSUSE Tumbleweed< 1.9.3-1.2
Redhat2 products
Debian1 product
  • libnbd< 1.6.2-1
Ubuntu1 product
  • libnbdAll versions (No fix recorded)

5 vendors · 9 products

References

9 links